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Griscelli syndrome.

H Ariffin1, A Geikowski2, T F Chin3

  • 1University of Malaya, Department of Paediatrics, Kuala Lumpur, Malaysia. hany@um.edu.my.

The Medical Journal of Malaysia
|December 16, 2014
PubMed
Summary
This summary is machine-generated.

Griscelli Syndrome (GS) can initially mimic haemophagocytic lymphistiocytosis (HLH). Microscopic hair analysis and RAB27A gene mutation identification are key for diagnosing GS, enabling targeted therapy.

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Area of Science:

  • Genetics
  • Immunology
  • Dermatology

Background:

  • Griscelli Syndrome (GS) is a rare autosomal recessive disorder.
  • Patients often present with clinical features overlapping with haemophagocytic lymphistiocytosis (HLH).
  • Early diagnosis is crucial for effective management.

Purpose of the Study:

  • To report a case of Griscelli Syndrome (GS) initially diagnosed as haemophagocytic lymphistiocytosis (HLH).
  • To highlight the diagnostic utility of hair follicle microscopy and genetic analysis in GS.
  • To emphasize the importance of recognizing GS for appropriate treatment initiation.

Main Methods:

  • Clinical presentation and initial diagnosis of HLH.
  • Microscopic examination of hair follicles for melanosome distribution.
  • Genetic analysis of the RAB27A gene to identify mutations.

Main Results:

  • The patient presented with symptoms consistent with HLH.
  • Hair follicle analysis revealed abnormal melanosome distribution, a hallmark of GS.
  • A homozygous nonsense mutation (c.550C>T, p.R184X) in the RAB27A gene was identified, leading to a dysfunctional RAB27A protein.

Conclusions:

  • This case underscores the importance of considering GS in patients presenting with HLH.
  • Hair microscopy and RAB27A gene sequencing are vital diagnostic tools for GS.
  • Accurate diagnosis of GS facilitates appropriate treatment, including chemotherapy for HLH and hematopoietic stem cell transplantation.